*::after, *::before {
  box-sizing: border-box;
}

*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

section {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: #edf1f4;
}

.box {
  position: relative;
}

.container {
  position: relative;
  min-width: 400px;
  background: #EEF0F4;
  border-radius: 10px;
  box-shadow: 10px 10px 30px rgba(0, 0, 0, .1),
    -15px -15px 30px #FFF;
}

#dycalendar {
  width: 100%;
  padding: 30px 30px;
  
}

#dycalendar table {
  width: 100%;
  border-spacing: 15px;
  margin-top: 40px;
}

#dycalendar table tr:nth-child(1) td {
  background: #2196f3;
  color: #FFF;
  border-radius: 10px;
  font-weight: 600;
  box-shadow: 5px 5px 10px rgba(0,0,0,.1),
    -5px -5px 10px #fff;
  border: 2px solid #edf1f4;
}

#dycalendar table tr:nth-child(1) td:nth-child(1) {
  background: #f44336;
}

#dycalendar table td {
  color: #777;
  padding: 10px 15px;
  cursor: pointer;
  font-weight: 500;
  border-radius: 10px;
  font-size: 1.25em;
  box-shadow: 5px 5px 15px rgba(0,0,0,.1),
    -5px -5px 10px rgba(255,255,255,1);
}

#dycalendar table td:hover {
  box-shadow: inset 5px 5px 15px rgba(0,0,0,.1),
  inset -5px -5px 10px rgba(255,255,255,1);
}

#dycalendar table td:first-child {
  color: #f44336;
}

.dycalendar-month-container .dycalendar-target-date {
  background: #2196f3;
  color: #FFF !important;
  box-shadow: 5px 5px 15px rgba(0,0,0,.1),
  -5px -5px 10px rgba(255,255,255,1) !important;
  border: 2px solid #edf1f4;
}

.dycalendar-month-container .dycalendar-header .dycalendar-prev-next-btn.prev-btn {
  width: 45px;
  height: 45px;
  line-height: 45px;
  font-size: 1.4em;
  left: 15px;
  color: #777;
  background: #edf1f4;
  border-radius: 10px;
  box-shadow:  5px 5px 15px rgba(0,0,0,.1),
   -5px -5px 10px rgba(255,255,255,1) !important;
}

.dycalendar-month-container .dycalendar-header .dycalendar-prev-next-btn.next-btn {
  width: 45px;
  height: 45px;
  line-height: 45px;
  font-size: 1.4em;
  right: 15px;
  color: #777;
  background: #edf1f4;
  border-radius: 10px;
  box-shadow:  5px 5px 15px rgba(0,0,0,.1),
   -5px -5px 10px rgba(255,255,255,1) !important;
}

.dycalendar-month-container .dycalendar-header .dycalendar-prev-next-btn.prev-btn:active,
.dycalendar-month-container .dycalendar-header .dycalendar-prev-next-btn.next-btn:active {
  box-shadow: inset 5px 5px 15px rgba(0,0,0,.1),
  inset -5px -5px 10px rgba(255,255,255,1);
}

.dycalendar-span-month-year {
  color: #2196f3;
  font-size: 2em;
  font-weight: 400;
}